Sandpapering-machine.



PATENTED JULY 16, 1907.

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J. QRAMELSPAOHER. SANDPAPBRING MACHINE; APPLICATION FILED APR 14 1906J/m mmekpmc INVENTOR.

PATENTED JULY 16, 1907.

J. GRAMELSPAGHER. SANDPAPERING MACHINE.

APPLICATION FILED APR. 14, 1908.

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INVENTOR,

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WIINESSZZS:

PATENT OFFICE.

JOHN GRAMELSPACHER, OF JASPER, INDIANA.

SANDPAPERING-MAOHINE.

Specification of Letters Patent.

Patented July 16, 1907.

Application filed April 14, 1908. Serial No. 811,748.

To all whom it may concern;

Be it known that 1, JOHN GRAMELSPACHER, a citizen of the United States,residing at Jasper, in the county of Dubois and State of Indiana, haveinvented a new and useful Sandpapering-Machine, of which the followingis a specification.

This invention relates to sand papering machines of that class employingan endless abrasive belt, and has for its object to adapt the same forpolishing curved surfaces as well as straight surfaces, and tofacilitate the polishing of inside work as well as outside work.

A further object of the invention is to provide for the convenientsubstitution of formers of various shapes according to the character ofthe work, and to support such formers in cooperative relation with thebelt so as to compel the latter to assume the shape of the work andthereby effectually polish all portions thereof.

A still further object of the invention is to provide for conveying thedust away from the operator in order that there may be no beclouding ofthe work.

With. these objects in view, the invention consists in the combinationand arrangement of parts as will be hereinafter more fully described,shown in the accompanying drawings and particularly pointed out in theappended claims, it'being understood that changes in the form,proportion, size and minor details may be made, within the scope of theclaims without departing from the spirit or sacrificing any of theadvantages of the invention.

' In the drawings,-Figure 1 is a side elevation of a sand paperingmachine embodying the features of the present invention. Fig. 2 is aplan view thereof, parts of the dust conveyer being broken away. Fig. 3is an 'ofa building, By preference, this standard is tubular and is incommunication with a suction pipe, into which the dust from the work isdesigned to be drawn and then carried off so as not to interfere withthe work of the operator.

At a suitable height above the floor, a '1 or other coupling 3 isprovided upon a tubular standard 1, and

a substantially horizontal tubular arm 4 is connected with the coupling.Upon the outer end of the arm 4 is a tubular elbow 5, and a T shapedcoupling 6 is carried by the outer end of the elbow 5.

Working endwise through the head of the T-coupling 6 is the shank 7 of afork or yoke 8 in which is mounted a pulley 9 upon a horizontal axis. Asuitable set screw 10 pierces the head of the coupling 6 and engages theshank of. the yoke so as to hold the latter at any adjusted position. Anadjusting screw 11 pierces the rear closed end of the coupling 6 andengages the rear end of the stem 7 so as to adjust the latter endwise.By preference, a sleeve or extension 12 projects forwardly from theT-coupling 6 so as to house the forward portion of the stem 7.

An endless abrasive belt 13 travels over the pulley 9, with its upperply leading rearwardly across the top of the coupling or bracket 6 andaround a larger pulley 14 carried by a horizontal shaft 15 mounted inspaced bearings 16 carried by the ends of a U-shaped or yokeshapedbracket 17, which is in turn secured to the standard 1 in some suitablemanner, for instance, by means of a clip or clamp 18. Opposite thepulley 14, the shaft 15 projects beyond the adjacent bracket and isprovided with fast and loose pulleys 19 and 20, with which cooperate adrive belt 21. g

It is proposed to locate the work support upon the bracket formed by themembers 6 and 12, said work support consisting of a base or block 22having clips or clamps 23 embracing the part 12 of the bracket so as torigidly hold the base upon the top of the bracket member 12. This-baseprojects at opposite sides of the bracket member 12, as best indicatedby Fig. 4 of the drawings, and each projecting edge portion is providedwith an upwardly and inwardly inclined opening 24 through which passes ascrew 25 adapted to take into a threaded socket in the under flat sideof an appropriate former 26, the upper face of which has a suitableconfiguration and is in engagement with the inside of the upper ply ofthe abrasive belt. As shown in Fig. 4 of the drawings, the former 26 hasa convex upper face, and when a piece of work having a concaved face ispressed against the upper ply of the belt over the work support, saidbelt conforms to the cross sectional shape of the former 26 and therebytakes on the form of the work and effectually polishes all portions ofthe latter. It will, of course, be understood that each apparatus isequipped with a plurality of formers having various configurations so asto accommodate the apparatus to work of any shape.

As hereinbefore indicated, it is proposed to carry off the dustgenerated by the action of the abrasive belt upon the work, and this isaccomplished by means of an upwardly and rearwardly inclined suctionwhereby the suction pipe is supported and the dust is drawn into thestandard 1 and then carried off to any remote point.

' In practice, the operator stands in front of the apparatus and bringsthe work into engagement with the upper ply of the belt immediately overthe work holder, and as the dust generated by the belt is immediatelycarried off through the suction pipe, there is no beclouding of the workand the operator is in no wise annoyed by the dust. Of course it will beunderstood that the work support is located at a suitable height abovethe floor to give convenient accessvthercto by an operator standing uponthe floor. Ordinarily, the idle pulley 9 will be smaller than the drivepulley 14 in order that hollow or annular work may be passed over thepulley and engaged upon its inner surface by the upper ply of theabrasive belt, whereby the present apparatus is not confined to straightplain surfaces.

The dust which is carried into the standard 1 may be led out through thetop or bottom thereof, according to the surrounding conditions of eachindividual apparatus. As shown in Fig. 1 of the drawings, the bottom ofthe standard is closed, while its upper end is in communication with asuitable suction pipe 30, it being understood that the suction pipeshown is merely a conventional illustration of how the dust may be drawnaway from the work.

extending therefrom and embracing the guide, a former upon the worksupport. means insertibie through the work support for securing theformer thereon a rotatable element within the fork, and an endlessnbruding device supported by said element and extending over the former.

in testimony that I claim the foregoing as my own, I have hereto nilixedmy signature in the presence of two witnesses.

JOHN GRAMELSPACIIER.

Witnesses BEMAR TRAYLOR, LonIs "1. KOERNER.

